I'm trying to use STANDARD_HASH Oracle (12c) function in PL/SQL but seems not available:
SQL> exec dbms_output.put_line(STANDARD_HASH('test'));
BEGIN dbms_output.put_line(STANDARD_HASH('test')); END;
*
ERROR at line 1:
ORA-06550: line 1, column 28:
PLS-00201: identifier 'STANDARD_HASH' must be declared
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored
From sql is working just fine:
SQL> select STANDARD_HASH('test') from dual;
STANDARD_HASH('TEST')
----------------------------------------
A94A8FE5CCB19BA61C4C0873D391E987982FBBD3
Why? What is the best way to implement the STANDARD_HASH in PLSQL?
Regards
Seems like it isn't yet a part of PL/SQL in 12c
.
As a workaround, use SELECT INTO
in PL/SQL:
SQL> set serveroutput on
SQL> DECLARE
2 str VARCHAR2(40);
3 BEGIN
4 SELECT STANDARD_HASH('test') INTO str FROM dual;
5 dbms_output.put_line(str);
6 END;
7 /
A94A8FE5CCB19BA61C4C0873D391E987982FBBD3
PL/SQL procedure successfully completed.
SQL>
I would suggest to create a function, and use it whenever you need it in PL/SQL.
For example,
SQL> CREATE OR REPLACE FUNCTION STANDARD_HASH_OUTPUT(str IN VARCHAR2)
2 RETURN VARCHAR2
3 AS
4 op VARCHAR2(40);
5 BEGIN
6 SELECT STANDARD_HASH(str) INTO op FROM dual;
7 RETURN op;
8 END;
9 /
Function created.
Call the function directly in PL/SQL block:
SQL> BEGIN
2 dbms_output.put_line(STANDARD_HASH_OUTPUT('test'));
3 END;
4 /
A94A8FE5CCB19BA61C4C0873D391E987982FBBD3
PL/SQL procedure successfully completed.
SQL>
For text, STANDARD_HASH is the same as DBMS_CRYPTO.HASH with SHA1:
begin
dbms_output.put_line(dbms_crypto.hash(cast('test' as clob), dbms_crypto.hash_sh1));
end;
/
Output:
A94A8FE5CCB19BA61C4C0873D391E987982FBBD3
For other data types, it's not documented how they are passed to the hash function.
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